Computers are used in today’s technological world as a powerful tool to simulate many complex phenomena in various fields. This book is an introduction to some of these exciting developments. All the articles are written by experts in their respective fields. Each article teaches by example and the book contains case studies in fields as diverse as physics, biology, fluid dynamics, astrophysics, device modeling and weather simulation. This book should be of interest to a new researcher as an introduction to an exciting arena of computer applications. It should also benefit expert scientists, providing methods that may apply to their own problems or open up new research possibilities with unlimited promise.